export default function App()

in examples/website/brushing/app.js [116:191]
72 lines of code
8 McCabe index (conditional complexity)

export default function App({
  data,
  enableBrushing = true,
  brushRadius = 100000,
  strokeWidth = 2,
  opacity = 0.7,
  mapStyle = 'mapbox://styles/mapbox/light-v9'
}) {
  const {arcs, targets, sources} = useMemo(() => getLayerData(data), [data]);

  const layers = arcs &&
    targets && [
      new ScatterplotLayer({
        id: 'sources',
        data: sources,
        brushingRadius: brushRadius,
        brushingEnabled: enableBrushing,
        // only show source points when brushing
        radiusScale: enableBrushing ? 3000 : 0,
        getFillColor: d => (d.gain > 0 ? TARGET_COLOR : SOURCE_COLOR),
        extensions: [brushingExtension]
      }),
      new ScatterplotLayer({
        id: 'targets-ring',
        data: targets,
        brushingRadius: brushRadius,
        lineWidthMinPixels: 2,
        stroked: true,
        filled: false,
        brushingEnabled: enableBrushing,
        // only show rings when brushing
        radiusScale: enableBrushing ? 4000 : 0,
        getLineColor: d => (d.net > 0 ? TARGET_COLOR : SOURCE_COLOR),
        extensions: [brushingExtension]
      }),
      new ScatterplotLayer({
        id: 'targets',
        data: targets,
        brushingRadius: brushRadius,
        brushingEnabled: enableBrushing,
        pickable: true,
        radiusScale: 3000,
        getFillColor: d => (d.net > 0 ? TARGET_COLOR : SOURCE_COLOR),
        extensions: [brushingExtension]
      }),
      new ArcLayer({
        id: 'arc',
        data: arcs,
        getWidth: strokeWidth,
        opacity,
        brushingRadius: brushRadius,
        brushingEnabled: enableBrushing,
        getSourcePosition: d => d.source,
        getTargetPosition: d => d.target,
        getSourceColor: SOURCE_COLOR,
        getTargetColor: TARGET_COLOR,
        extensions: [brushingExtension]
      })
    ];

  return (
    <DeckGL
      layers={layers}
      initialViewState={INITIAL_VIEW_STATE}
      controller={true}
      getTooltip={getTooltip}
    >
      <StaticMap
        reuseMaps
        mapStyle={mapStyle}
        preventStyleDiffing={true}
        mapboxApiAccessToken={MAPBOX_TOKEN}
      />
    </DeckGL>
  );
}